Question 1

A dialysis bag containing 40% sucrose solution is placed in a beaker also containing 40% sucrose solution. In which direction will water move, and why?

Accepted Answer

Water will move in and out at equal rates because the solutions are isotonic.

Question 2

A dialysis bag contains 35% sucrose solution and is placed in a beaker with 25% sucrose solution. What will happen to the bag and why?

Accepted Answer

Water will move into the bag because the bag is hypertonic relative to the beaker.

Question 3

A dialysis bag filled with pure water is placed in a beaker containing 40% sucrose solution. Predict the direction of water movement and explain.

Accepted Answer

Water will move out of the bag because the beaker is hypertonic.

Question 4

A dialysis bag contains 20% sucrose solution and is placed in a beaker with 21% sucrose solution. What will happen to the bag?

Accepted Answer

Water will move out of the bag because the beaker is hypertonic.

Question 5

Which of the following factors would most increase the rate at which a dye molecule diffuses through an agar plate?

Accepted Answer

Increasing the concentration gradient across the agar.

Question 6

Janus Green and Potassium Permanganate were used to study diffusion in agar. Which scenario would result in the fastest diffusion rate?

Accepted Answer

Using a small molecule at high temperature with a steep concentration gradient.

Question 7

If a plant cell is placed in a hypotonic solution, what will most likely happen to the cell?

Accepted Answer

The cell will gain water and become turgid.

Question 8

If a plant cell is placed in a hypertonic solution, what is the expected outcome?

Accepted Answer

The cell will lose water and undergo plasmolysis.

Question 9

What is the best description of an isotonic solution for a plant cell?

Accepted Answer

The solution has the same solute concentration as the cell, resulting in no net water movement.

Question 10

A red blood cell is placed in a solution and it shrivels. What type of solution is it, and why?

Accepted Answer

It is a hypertonic solution because water leaves the cell.

Question 11

Which equation best describes the rate of diffusion according to Fick's Law?

Accepted Answer

$$ J = -D \frac{dC}{dx} $$

Question 12

A cell is placed in a solution and the cell membrane pulls away from the cell wall. What type of solution is this, and what is the process called?

Accepted Answer

Hypertonic; plasmolysis

Question 13

Which of the following best explains why small, nonpolar molecules diffuse faster through a cell membrane than large, polar molecules?

Accepted Answer

Small, nonpolar molecules can dissolve in the lipid bilayer and move more easily.

Question 14

If a cell is placed in a solution and there is no visible change in its appearance, what can you infer about the solution?

Accepted Answer

The solution is isotonic to the cell.

Question 15

Which of the following would NOT increase the rate of diffusion of a solute through a membrane?

Accepted Answer

Decreasing the concentration gradient.

Question 16

A plant cell is observed under a microscope after being placed in a solution. The chloroplasts are clumped in the center of the cell, away from the cell wall. What type of solution was the cell placed in?

Accepted Answer

Hypertonic

Question 17

Which of the following best describes osmosis?

Accepted Answer

The movement of water from low to high solute concentration across a selectively permeable membrane.

Question 18

A cell is placed in a solution and swells until it bursts. What type of solution is this, and what is the process called?

Accepted Answer

Hypotonic; cytolysis

Question 19

Which of the following is NOT a factor that affects the rate of diffusion?

Accepted Answer

The color of the molecule

Question 20

A plant cell is placed in distilled water. What will happen to the cell, and why?

Accepted Answer

The cell will gain water and become turgid because the solution is hypotonic.

Diffusion & Osmosis Worksheet Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard